Belfast weather in August 2023

  • 18°C maximum daytime temperature in August in Belfast18
    18°C max day temperature
  • 5 hours of sunshine per day
  • 17 days with some rainfall in August in Belfast17
    17 days with some rainfall
  • 11°C minimum night-time temperature in August in Belfast11
    11°C min night temperature
  • 15 hours of daylight per day in August in Belfast15
    15 hours of daylight per day
  • No heat & humidity in August in Belfast0
    No heat & humidity
  • 89 mm monthly rainfall in August in Belfast89
    89 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in August in Belfast5
    5 (Moderate) UV index
  • 13°C sea temperature in August in Belfast13
    13°C sea temperature

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The August weather guide for Northern Ireland (Belfast) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Metric (°C / mm)  |  Imperial (°F / inches)

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More about the UK

How hot is it in Belfast in August?

Daytime temperatures usually reach 18°C in Belfast in August, falling to 11°C at night.

How sunny is it in Belfast in August?

There are normally 5 hours of bright sunshine each day in Belfast in August - that's 32% of daylight hours.

How warm is the sea around Belfast in August?

The average sea temperature around Belfast in August is 13°C.

Does it rain in Belfast in August?

There are usually 17 days with some rain in Belfast in August and the average monthly rainfall is 89mm.

Belfast August sunrise & sunset times

Browse the sunrise and sunset times for Belfast in August 2023. Select a month to view Belfast sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st August 2023 05:34 21:25
Wednesday, 16th August 2023 06:01 20:54
Thursday, 31st August 2023 06:28 20:19

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